What is the working distance?
The distance from the objective lens to the top of the slide.
How does the orientation of a letter change under the microscope?
It is "flipped" to the left and turned upside down.
Move the slide away from you as you view it through the ocular lens. In what direction does the image move?
Move the slide to the left. In what direction does the image move?
Describe the importance of parfocal.
Microscopes are parfocal, meaning once focused at a lower magnification, only minor adjustments will be made to focus the specimen at higher magnifications.
As you move up in magnification, does the image become larger or smaller?
Moving up in magnification, does the field increase or decrease?
Is it more desirable to increase or to decrease light when changing to higher magnification?
Increase light because the objective lens opening decreases with increasing magnification, allowing less light to enter.